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From elisabeth benoit <>
Subject Re: solr 4.2.1 index gets slower over time
Date Mon, 31 Mar 2014 15:03:34 GMT

Thanks for your answer.

We use JVisualVM. The CPU usage is very high (90%), but the GC activity
shows less than 0.01% average activity. Plus the heap usage stays low
(below 4G while the max heap size is 16G).

Do you have a different tool to suggest to check the GC? Do you think there
is something else me might not see?

Thanks again,

2014-03-31 16:26 GMT+02:00 Shawn Heisey <>:

> On 3/31/2014 6:57 AM, elisabeth benoit wrote:
> > We are currently using solr 4.2.1. Our index is updated on a daily basis.
> > After noticing solr query time has increased (two times the initial size)
> > without any change in index size or in solr configuration, we tried an
> > optimize on the index but it didn't fix our problem. We checked the
> garbage
> > collector, but everything seemed fine. What did in fact fix our problem
> was
> > to delete all documents and reindex from scratch.
> >
> > It looks like over time our index gets "corrupted" and optimize doesn't
> fix
> > it. Does anyone have a clue how to investigate further this situation?
> That seems very odd.  I have one production copy of my index using
> 4.2.1, and it has been working fine for quite a long time.  We are
> transitioning to Solr 4.6.1 now, so the other copy is running that
> version.  We do occasionally do a full rebuild, but that is for index
> content, not for any problems.
> When you say you checked your garbage collector, what tools did you use?
>  I was having GC pause problems, but I didn't know it until I started
> using different tools.
> Thanks,
> Shawn

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